rosary

Từ điển Oxford Advanced Learner 8th

ros·ary [rosary rosaries] BrE [ˈrəʊzəri] NAmE [ˈroʊzəri] noun (pl. ros·aries)
1. countable a string of ↑beads that are used by some Roman Catholics for counting prayers as they say them
2. the Rosarysingular the set of prayers said by Roman Catholics while counting rosary ↑beads

Word Origin:
late Middle English (in the sense ‘rose garden’): from Latin rosarium ‘rose garden’, based on rosa ‘rose’.